What should be the capacitance of a capacitor capable of storing one joule of energy, when used with a 100 V d.c. supply?

What should be the capacitance of a capacitor capable of storing 1j of energy when potential difference of 100V is applied between the plates?

What should be the capacitance of a capacitor capable of storing 1J of energy when potential difference of 100V is applied between the plates?

What is the energy when number of capacitors are placed in series?

In a parallel plate capacitor with air between the plates, each plate has an area of 6 xx 10^-3 m^2 and the distance between the plates is 3 mm. Calculate the capacitance of the capacitor. If this capacitor is connected to a 100 V supply, what is the charge on each plate of the capacitor?

What is the energy when number of capacitors are placed in parallel?